Winner's Choice Strings & Cables are manufactured using 20 strands of BCY 8125 fiber in a Green/Tan camo twist. All Winner's Choice Strings & Cables carry a one-year warranty against peep rotation, serving separation, or creep after the 30 shot break-in period The combination of prestretching their fibers prior to assembly, & using a patented serving system enables them to offer the best string & warranty in the business.